20-K (45 mm)
Contents
Description
The 20-K (45 mm) is equipped on a number of rank I Russian tanks. It is a decent gun for its rank, and can still be useful in uptiers due to its high-penetrating APCR shell.
Vehicles equipped with this weapon
| Vehicles equipped with this weapon | |
|---|---|
| Light tanks | |
| BT-5 | BT-5 · RBT-5 |
| BT-7 | BT-7 |
| T-26 | T-26 · T-26 (1st Gv.T.Br.) · ␗T-26 · T-26 No.531 · T-26E |
| Other | BA-11 · T-50 · T-70 · T-80 · T-126 |
| Heavy tanks | SMK · T-35 |
General info
Tell us about the tactical and technical characteristics of the cannon or machine gun.
Available ammunition
- BR-240: APHEBC - This should be the main ammo type that you use, as it deals the most damage because of its explosive filler.
- BR-240P: APCR - This shell should only be used against more heavily armoured targets that the BR-240 cannot penetrate.
- BR-240SP: AP - It is recommended to avoid this kind of shell as it is inferior in most aspects compared to the BR-240P ammo.
- O-243: HE - Carry only very few of these. They are useless against anything other than unarmoured AA vehicles.
| Penetration statistics | |||||||
|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Penetration @ 0° Angle of Attack (mm) | |||||
| 10 m | 100 m | 500 m | 1,000 m | 1,500 m | 2,000 m | ||
| BR-240 | APHEBC | 70 | 68 | 59 | 50 | 42 | 35 |
| BR-240P | APCR | 106 | 99 | 72 | 49 | 33 | 23 |
| BR-240SP | AP | 73 | 71 | 62 | 52 | 44 | 37 |
| O-243 | HE | 4 | 4 | 4 | 4 | 4 | 4 |
| Shell details | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Velocity (m/s) |
Projectile Mass (kg) |
Fuse delay (m) |
Fuse sensitivity (mm) |
Explosive Mass (TNT equivalent) (g) |
Normalisation at 30° from horizontal |
Ricochet | ||
| 0% | 50% | 100% | ||||||||
| BR-240 | APHEBC | 760 | 1.43 | 1.2 | 9.0 | 29.3 | +4.0° | 48° | 63° | 71° |
| BR-240P | APCR | 1,070 | 0.85 | N/A | N/A | N/A | +1.5° | 66° | 70° | 72° |
| BR-240SP | AP | 757 | 1.43 | N/A | N/A | N/A | -1.0° | 47° | 60° | 65° |
| O-243 | HE | 343 | 2.15 | 0.4 | 0.3 | 118 | 0.0° | 79° | 80° | 81° |
Comparison with analogues
- Germany - 50 mm KwK 38
- USA - 37 mm M6
- Great Britain - 57 mm OQF 6-pounder Mk.III
Usage in battles
The 20-K (45 mm) is a decent gun for its rank. In downtiers, it is a very effective and lethal weapon, and can take out most tanks with 1-2 shots. However, in uptiers, it will be more difficult to take out tanks because of the relatively small calibre. However, this doesn't mean that you are useless. The APCR round is capable of penetrating most rank II vehicles, however the post-penetration damage is poor due to the lack of an explosive filler.
Pros and cons
Pros:
- Decent penetration
- Quick reload
- Has access to APCR with 104 mm of penetration at point-blank
- Shells have a medium-high velocity, makes aiming easier
Cons:
- Due to the small calibre, post-penetration effects are bad
- APHEBC rounds will have trouble
History
Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: https://wiki.warthunder.com/(Weapon-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref></ref>, as well as adding them at the end of the article with <references />.
Media
An excellent addition to the article would be a video guide, as well as screenshots from the game and photos.
See also
Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:
- reference to the article about the variant of the cannon/machine gun;
- references to approximate analogues by other nations and research trees.
External links
Paste links to sources and external resources, such as:
- topic on the official game forum;
- encyclopedia page on the weapon;
- other literature.
| USSR tank cannons | |
|---|---|
| 20 mm | TNSh |
| 30 mm | 2A42 · 2A72 · AG-30 |
| 45 mm | 20-K |
| 57 mm | AU-220 · Ch-51M · ZIS-2 · ZIS-4 · ZIS-4M |
| 73 mm | 2A28 |
| 76 mm | 1902/30 · 3-K · D-56TS · F-32 · F-34 · F-96 · KT-28 · L-10 · L-11 · ZIS-3 · ZIS-5 |
| 85 mm | D-5S · D-5T · D-58 · D-70 · F-30 · ZIS-S-53 |
| 100 mm | 2A48 · 2A70 · D-10S · D-10T · D-10T2S · D-50 · LB-1 · S-34 |
| 107 mm | ZIS-6 |
| 115 mm | U-5TS |
| 122 mm | A-19 · D-25-44T · D-25S · D-25T · D-25TS · D-30T · D-49 · M-30 · M-62-T2S |
| 125 mm | 2A26 · 2A46 · 2A46M · 2A46M-1 · 2A46M-4 · 2A46M-5 · 2A46MS · 2A75 · D-126 |
| 130 mm | B-13 · C-70 · M-65 |
| 152 mm | 2A33 · LP-83 · M-10T · M-64 · M-69 · ML-20S |
| Foreign: | |
| 37 mm | M5 (USA) |
| 50 mm | KwK L/42 (Germany) |
| 57 mm | 6pdr OQF Mk.III (Britain) · M1 (USA) |
| 75 mm | KwK42 (Germany) · M2 (USA) |
| 76 mm | M1 (USA) |
| 85 mm | Type-62-85-TC (China) |
| China tank cannons | |
|---|---|
| 30 mm | ZPL02 · ZPZ02 |
| 73 mm | Type 86 |
| 76 mm | M32K1 |
| 85 mm | Type 56 · Type 63 |
| 100 mm | PTP86 · Type 59 · Type 69 · Type 69-II · ZPL04 |
| 105 mm | 88B-105T · Type 83 · WMA301 · ZPL94 · ZPL98A |
| 120 mm | 122TM · PTZ89 |
| 125 mm | Type 88C · Type 99A · ZPT98 |
| 130 mm | PL59A Gai |
| 152 mm | PL66 Gai |
| Foreign: | |
| 20 mm | KwK30 (Germany) |
| 37 mm | M6 (USA) |
| 45 mm | 20-K (USSR) |
| 47 mm | Type 1 (Japan) |
| 57 mm | Type 97 (Japan) · ZIS-2 (USSR) |
| 75 mm | M2 Howitzer (USA) · M3 (USA) · M6 (USA) |
| 76 mm | D-56T (USSR) · F-34 (USSR) · M1 (USA) · M7 (USA) · ZIS-3 (USSR) |
| 85 mm | ZIS-S-53 (USSR) |
| 90 mm | M3 (USA) · M41 (USA) |
| 100 mm | D-10S (USSR) |
| 105 mm | M68 (USA) · M68A1 (USA) |
| 115 mm | U-5TS (USSR) |
| 122 mm | A-19 (USSR) · D-25T (USSR) |
| 152 mm | ML-20S (USSR) |
